Journal List > J Korean Acad Psychiatr Ment Health Nurs > v.21(1) > 1057944

Shin, Shin, Ju, Jang, Hong, Jeon, and Yu: A Study on Reliability and Validity of the Nurses' Global Assessment of Suicide Risk (NGASR) for Psychiatric Inpatients

Abstract

Purpose

Assessment of suicide risk is a critical task for nurses, especially for nurses working with psychiatric inpatients. The purpose of this study was to verify the reliability and validity of the Nurses' Global Assessment of Suicide Risk (NGASR) for psychiatric inpatients.

Methods

This study was methodological study. A scale composed of 15 items was used with 106 psychiatric inpatients in open and closed psychiatric units of a tertiary hospital. Cohen's kappa coefficient, Intraclass correlation, factor analysis and Jonckheere-Terpstra Test for Ordered Alternatives were used for statistic analysis.

Results

Main results were as follows; Reliability of the scale was supported with a total intraclass correlation coefficient of .890 (range from .722 to 1.000). In investigating construct validity, 15 items loaded on six factors which explained 63.4% of total variance. Also the Jonckheere-Terpstra test revealed a significant trend in the order of median scores of NGASR across the three groups of Evaluation of Suicide Risk (ESR). These results supported the criterion-related validity of the scale.

Conclusion

The findings in this study indicate that this scale is reliable and valid in assessing suicide risk of psychiatric inpatients. Therefore it is an appropriate scale to assess suicide risk for psychiatric inpatients.

Figures and Tables

Figure 1
Boxplot of the nurses' global assessment of suicide risk (NGASR) score across change in evaluation of suicide risk.
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Table 1
General Characteristics of Subjects (N=106)
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Table 2
Inter-rater Reliability of NGASR (N=15)
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NGASR=the nurses' global assessment of suicide risk.

Intraclass Correlation Coefficiency (ICC).

Table 3
Rotated Factor Structure of NGASR (N=96)
jkapmhn-21-21-i003

NGASR=the nurses' global assessment of suicide risk.

Table 4
Jonckheere-Terpstra Test for Ordered Alternatives (N=96)
jkapmhn-21-21-i004

NGASR=the nurses' global assessment of suicide risk.

Notes

This study was supported by clinical nursing research fund of Samsung Medical Center in 2010.

Appendix

Appendix 1

NGASR

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